Author Topic: After uninstalling Avast Microsoft Defender doesn't run  (Read 1014 times)

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Offline Pealo

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After uninstalling Avast Microsoft Defender doesn't run
« on: June 23, 2022, 12:01:10 PM »
After uninstalling avast free antivirus, my notification pop up regarding activating the microsoft inbuild virus and threat protection.
Sadly the whole page is not available to me after the avast uninstall. First it states that my local IT Administrator limited service. Then no single feature of the virus and threat protection is usable. For example if click "real time protection" on it will snap back to off right away.
Further it states the virus and threat protection as "unknown".
I would like to use it as previous. I have tried various methodes of fixing with regedit, group policies etc but these didn't help so far.
Any help really appreciated!

Offline Asyn

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Re: After uninstalling Avast Microsoft Defender doesn't run
« Reply #1 on: June 23, 2022, 12:07:32 PM »
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline Pealo

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Re: After uninstalling Avast Microsoft Defender doesn't run
« Reply #2 on: June 23, 2022, 12:18:44 PM »
Followed Instructions; didn't help

Offline Asyn

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Re: After uninstalling Avast Microsoft Defender doesn't run
« Reply #3 on: June 23, 2022, 12:34:24 PM »
Followed Instructions; didn't help
If so, best you contact MS support.
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline CraigB

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Re: After uninstalling Avast Microsoft Defender doesn't run
« Reply #4 on: June 23, 2022, 01:01:32 PM »
Sometimes a couple of reboots are required for Defender to sort itself out after AV changes are made.